definition of
bullet

[1] #1 bullet n. [slug] a projectile that is fired from a gun. wn

[2] #2 bullet n. [bullet train] a high-speed passenger train. wn

[3] #3 bullet n. [fastball, heater, smoke, hummer] (baseball) a pitch thrown with maximum velocity; "he swung late on the fastball"; "he showed batters nothing but smoke". wn